221021221212002 has 8 divisors (see below), whose sum is σ = 331549152382812. Its totient is φ = 110504837084400.

The previous prime is 221021221211971. The next prime is 221021221212017. The reversal of 221021221212002 is 200212122120122.

It can be written as a sum of positive squares in 2 ways, for example, as 215293436840161 + 5727784371841 = 14672881^2 + 2393279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2886712949 + ... + 2886789512.

Almost surely, 2^{221021221212002} is an apocalyptic number.

221021221212002 is a deficient number, since it is larger than the sum of its proper divisors (110527931170810).

221021221212002 is a wasteful number, since it uses less digits than its factorization.

221021221212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773521604.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221021221212002 its reverse (200212122120122), we get a palindrome (421233343332124).

The spelling of 221021221212002 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, two".